几种常见圆形缺口试样的极限载荷

Limit Load Formulae of Several Commom Round Notch Specimens

推导了平面应力条件下单边圆形底部深缺口板条受纯弯曲和拉伸载荷作用的极限载荷公式。通过对比可求出受拉伸板条与受纯弯曲板条极限载荷之间的修正系数，从而将三点弯曲试样极限载荷公式经修正后用于单边缺口和紧凑拉伸缺口试样。同时，文中汇总了其它几种常用缺口试样的极限载荷公式。

The limit load formulae of single-edge deeply notched plates with round ends subjected to pure bend moment and tensile load under plane stress condition have been derived. By comparison between them with the limit loads of tension plate and pure bend plate the modification factor can be obtained so that the limit load formula of the three-point bend notched specimen may be extended to single edge notched plate and compact tension notched specimens by modefication. Furthermore,the limit load formulae of several other common notchecd specimens have been summarized. These formulae are essential to the limit load analysis and double-criterion failure assessment diagram investigations.